The concept of photocatalytic CO and HO conversion to solar fuels and value-added products provides simultaneous solution for increased energy demands and environmental problems. However, the lack of efficient photocatalysts restrains the large-scale development of photocatalytic technology. In the present study, noble (Pt and Au) and transition metal (Ni) doped nanoflakes assembled on TiO@carbon microrods with high surface area and rutile crystal structure is prepared via fast, versatile solvothermal method. The photocatalytic performance of the prepared nanocomposites was evaluated in two photocatalytic systems: CO reduction and hydrogen production via photoreforming. Pt-doped catalyst showed enhanced hydrogen production efficiency and increased CH selectivity, while Ni-doped catalyst exhibited remarkable CO reduction activity with higher selectivity towards CO. The mechanism of Pt-promoted CH formation and Ni- and Au-promoted CO formation was thoroughly discussed regarding kinetic and thermodynamic parameters.

中文翻译：

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金属掺杂二氧化钛装饰碳纳米结构材料作为太阳能燃料生产的新兴光催化剂

光催化 CO 和 H2O 转化为太阳能燃料和增值产品的概念为日益增长的能源需求和环境问题提供了同时解决方案。然而，高效光催化剂的缺乏限制了光催化技术的大规模发展。在本研究中，通过快速、通用的溶剂热方法制备了组装在具有高表面积和金红石晶体结构的TiO@碳微棒上的贵金属（Pt和Au）和过渡金属（Ni）掺杂的纳米片。所制备的纳米复合材料的光催化性能在两种光催化系统中进行了评估：CO 还原和光重整制氢。 Pt掺杂催化剂表现出较高的产氢效率和CH选择性，而Ni掺杂催化剂表现出显着的CO还原活性，对CO具有更高的选择性。对Pt促进CH形成以及Ni和Au促进CO形成的机理进行了深入讨论关于动力学和热力学参数。